plomlompom.com Git - plomrogue2/blob - plomrogue/io.py

   1 import queue
   2 import threading
   3 import inspect
   4
   5
   6
   7 class GameIO():
   8
   9     def __init__(self, game, save_file='savefile'):
  10         from plomrogue.parser import Parser
  11         self.parser = Parser(game)
  12         self.game = game
  13         self.save_file = save_file
  14         self.servers = []
  15
  16     def loop(self, q):
  17         """Handle commands coming through queue q, run game, send results back.
  18
  19         As basic flood protection, only accepts ten commands per connection per
  20         1/10 of a second.
  21
  22         """
  23         import time
  24         potential_flooders = {}
  25         while True:
  26             try:
  27                 connection_id, command = q.get(timeout=0.001)
  28                 now = int(time.time() * 10)
  29                 if connection_id in potential_flooders and \
  30                    potential_flooders[connection_id][0] == now:
  31                     if potential_flooders[connection_id][1] > 10:
  32                         continue
  33                     potential_flooders[connection_id][1] += 1
  34                 else:
  35                     potential_flooders[connection_id] = [now, 1]
  36                 self.handle_input(command, connection_id)
  37             except queue.Empty:
  38                 self.game.run_tick()
  39
  40     def start_loop(self):
  41         """Start game loop, set up self.queue to communicate with it.
  42
  43         The game loop works sequentially through game commands received
  44         via self.queue from connected servers' clients."""
  45
  46         self.queue = queue.Queue()
  47
  48         # optionally use this for main thread profiling:
  49         # import cProfile
  50         # class ProfiledThread(threading.Thread):
  51         #     def run(self):
  52         #         profiler = cProfile.Profile()
  53         #         profiler.runcall(threading.Thread.run, self)
  54         #         print('profiled thread finished')
  55         #         profiler.dump_stats('profile')
  56         # c = ProfiledThread(target=self.loop, args=(self.queue,))
  57         c = threading.Thread(target=self.loop, args=(self.queue,))
  58
  59         c.start()
  60
  61     def start_server(self, port, server_class, certfile=None, keyfile=None):
  62         """Start server of server_class in talk with game loop.
  63
  64         The server communicates with the game loop via self.queue.
  65         """
  66         if 'certfile' in list(inspect.signature(server_class.__init__).parameters):
  67             server = server_class(self.queue, port, certfile=certfile, keyfile=keyfile)
  68         else:
  69             server = server_class(self.queue, port)
  70         self.servers += [server]
  71         c = threading.Thread(target=server.serve_forever)
  72         c.start()
  73
  74     def handle_input(self, input_, connection_id=None, god_mode=False):
  75         """Process input_ to command grammar, call command handler if found.
  76
  77         Command handlers that have no connectin_i argument in their
  78         signature will only be called if god_mode is set.
  79
  80         """
  81         from plomrogue.errors import GameError, ArgError, PlayError
  82         from plomrogue.misc import quote
  83
  84         def answer(connection_id, msg):
  85             if connection_id:
  86                 self.send(msg, connection_id)
  87             else:
  88                 print(msg)
  89
  90         try:
  91             command, args = self.parser.parse(input_)
  92             if command is None:
  93                 answer(connection_id, 'UNHANDLED_INPUT')
  94             else:
  95                 if 'connection_id' in list(inspect.signature(command).parameters):
  96                     command(*args, connection_id=connection_id)
  97                 elif god_mode:
  98                     command(*args)
  99                     # if store and not hasattr(command, 'dont_save'):
 100                     #     with open(self.game_file_name, 'a') as f:
 101                     #         f.write(input_ + '\n')
 102         except ArgError as e:
 103             answer(connection_id, 'ARGUMENT_ERROR ' + quote(str(e)))
 104         except PlayError as e:
 105             answer(connection_id, 'PLAY_ERROR ' + quote(str(e)))
 106         except GameError as e:
 107             answer(connection_id, 'GAME_ERROR ' + quote(str(e)))
 108
 109     def send(self, msg, connection_id=None):
 110         """Send message msg to servers' client(s).
 111
 112         If a specific client is identified by connection_id, only
 113         sends msg to that one. Else, sends it to all client sessions.
 114
 115         """
 116         if connection_id:
 117             for server in self.servers:
 118                 if connection_id in server.clients:
 119                     client = server.clients[connection_id]
 120                     client.put(msg)
 121         else:
 122             for c_id in self.game.sessions:
 123                 for server in self.servers:
 124                     if c_id in server.clients:
 125                         client = server.clients[c_id]
 126                         client.put(msg)
 127                         break